bpfc: Don't duplicate copyright/bug report/license string

Move the copyright/bug report/license string to an own constant and use
it for the output of help() and version() to avoid duplication and
prevent the strings from getting out of sync.  This makes the text
section of bpfc.o slightly smaller:

before:
   text	   data	    bss	    dec	    hex	filename
   3594	      0	      0	   3594	    e0a	bpfc/bpfc.o

after:
   text	   data	    bss	    dec	    hex	filename
   3313	      0	      0	   3313	    cf1	bpfc/bpfc.o

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

0 files changed, 0 insertions, 0 deletions